To combat hatred directed toward a person, a Buddhist cultivates loving kindness toward that person.
Dalai LamaOne Mongolian leader became a very, very brutal dictator and eventually became a murderer. Previously, he was a monk, and then he became a revolutionary. Under the influence of his new ideology, he actually killed his own teacher. Pol Pot's family background was Buddhist. Whether he himself was a Buddhist at a young age, I don't know. Even Chairman Mao's family background was Buddhist. So one day, if the Dalai Lama becomes a mass murderer, he will become the most deadly of mass murderers.
Dalai Lama